US3297162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter with extended service life
Assignee: Purolator Products Inc
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Filing: 1963-09-04
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Granted: 1967-01-10
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Expires: 1983-09-04
Abstract
No abstract record available.
Inventors
- 👤 Herman C Mouwen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:36
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/08; B01D27/10; B01D27/103; B01D27/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
322 words
A FILTER ELEMENT FOR FILTERING A FLOW OF FLUID WITH RESPECT THERETO COMPRISING A TUBULAR MEMBER HAVING A PLURALITY OF APERTURES EXTENDING THERETHROUGH, A FIRST FILTER MEANS DISPOSED ABOUT THE SIDE PORTION OF SAID TUBULAR MEMBER, ONE END PORTION OF SAID TUBULAR MEMBER BEING ADAPTED FOR CONNECTION TO A DISCHARGE PASSAGE, A FIRST VALVE HOUSING DISPOSED ADJACENT THE OTHER END PORTION OF SAID TUBULAR MEMBER DISPOSED OPPOSITE SAID ONE END PORTION, SAID FIRST VALVE HOUSING HAVING A FIRST OPENING IN COMMUNICATION WITH THE EXTERIOR OF SAID FIRST FILTER MEANS AND THE INTERIOR OF SAID FIRST VALVE HOUSING, A FIRST PRESSURE RESPONSIVE VALVE MOUNTED WITHIN SAID FIRST VALVE HOUSING ADJACENT SAID FIRST OPENING THEREIN, SAID FIRST VALVE NORMALLY CLOSING SAID FIRST OPENING AND BEING RESPONSIVE TO A PREDETERMINED PRESSURE DROP ACROSS SAID FIRST FILTER MEANS FOR BYPASSING AT LEAST A PORTION OF SAID FLOW WITH RESPECT THERETO THROUGH SAID FIRST VALVE HOUSING, A SECOND FILTER MEANS EXTENDING ABOUT SAID FIRST VALVE HOUSING FOR FILTERING SAID PORTION OF SAID FLUID BEING BYPASSED BY SAID FIRST VALVE INTO SAID TUBULAR MEMBER, SAID SECOND FILTER MEANS HAVING A SECOND OPENING IN COMMUNICATION WITH SAID FIRST VALVE, A SECOND VALVE HOUSING EXTENDING ADJACENT SAID SECOND OPENING, SAID SECOND VALVE HOUSING HAVING A THIRD OPENING THEREIN, AND A SECOND PRESSURE RESPONSIVE VALVE MOUNTED WITHIN SAID SECOND VALVE HOUSING ADJACENT SAID THIRD OPENING, SAID SECOND VALVE NORMALLY CLOSING SAID THIRD OPENING AND BEING RESPONSIVE TO AN ADDITIONAL PREDETERMINED PRESSURE DROP ACROSS SAID SECOND FILTER MEANS FOR BYPASSING INTO SAID TUBULAR MEMBER AT LEAST A FRACTION OF SAID PORTION OF FLOW WITH RESPECT THERETO TO RELIEVE THE PRESSURE DROP ACROSS SAID FIRST FILTER MEANS AND SAID SECOND FILTER MEANS, WHEREBY THE OPENING OF SAID SECOND VALVE ENABLES AT LEAST A FRACTION OF SAID PORTION OF FLOW BYPASSING SAID FIRST FILTER BY FLOWING THROUGH SAID FIRST OPENING TO FLOW SERIALLY THROUGH SAID SECOND OPENING INTO THE INTERIOR OF SAID TUBULAR MEMBER.
Claim 2
Dependent Claim
322 words
A FILTER ELEMENT FOR FILTERING A FLOW OF FLUID WITH RESPECT THERETO COMPRISING A TUBULAR MEMBER HAVING A PLURALITY OF APERTURES EXTENDING THERETHROUGH, A FIRST FILTER MEANS DISPOSED ABOUT THE SIDE PORTION OF SAID TUBULAR MEMBER, ONE END PORTION OF SAID TUBULAR MEMBER BEING ADAPTED FOR CONNECTION TO A DISCHARGE PASSAGE, A FIRST VALVE HOUSING DISPOSED ADJACENT THE OTHER END PORTION OF SAID TUBULAR MEMBER DISPOSED OPPOSITE SAID ONE END PORTION, SAID FIRST VALVE HOUSING HAVING A FIRST OPENING IN COMMUNICATION WITH THE EXTERIOR OF SAID FIRST FILTER MEANS AND THE INTERIOR OF SAID FIRST VALVE HOUSING, A FIRST PRESSURE RESPONSIVE VALVE MOUNTED WITHIN SAID FIRST VALVE HOUSING ADJACENT SAID FIRST OPENING THEREIN, SAID FIRST VALVE NORMALLY CLOSING SAID FIRST OPENING AND BEING RESPONSIVE TO A PREDETERMINED PRESSURE DROP ACROSS SAID FIRST FILTER MEANS FOR BYPASSING AT LEAST A PORTION OF SAID FLOW WITH RESPECT THERETO THROUGH SAID FIRST VALVE HOUSING, A SECOND FILTER MEANS EXTENDING ABOUT SAID FIRST VALVE HOUSING FOR FILTERING SAID PORTION OF SAID FLUID BEING BYPASSED BY SAID FIRST VALVE INTO SAID TUBULAR MEMBER, SAID SECOND FILTER MEANS HAVING A SECOND OPENING IN COMMUNICATION WITH SAID FIRST VALVE, A SECOND VALVE HOUSING EXTENDING ADJACENT SAID SECOND OPENING, SAID SECOND VALVE HOUSING HAVING A THIRD OPENING THEREIN, AND A SECOND PRESSURE RESPONSIVE VALVE MOUNTED WITHIN SAID SECOND VALVE HOUSING ADJACENT SAID THIRD OPENING, SAID SECOND VALVE NORMALLY CLOSING SAID THIRD OPENING AND BEING RESPONSIVE TO AN ADDITIONAL PREDETERMINED PRESSURE DROP ACROSS SAID SECOND FILTER MEANS FOR BYPASSING INTO SAID TUBULAR MEMBER AT LEAST A FRACTION OF SAID PORTION OF FLOW WITH RESPECT THERETO TO RELIEVE THE PRESSURE DROP ACROSS SAID FIRST FILTER MEANS AND SAID SECOND FILTER MEANS, WHEREBY THE OPENING OF SAID SECOND VALVE ENABLES AT LEAST A FRACTION OF SAID PORTION OF FLOW BYPASSING SAID FIRST FILTER BY FLOWING THROUGH SAID FIRST OPENING TO FLOW SERIALLY THROUGH SAID SECOND OPENING INTO THE INTERIOR OF SAID TUBULAR MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |